Spring-motor.



O. E. LARSO-N. SPRING MGTOR.

APPLICATION FILED Nov. 21, 1913.

.1, 1 8,20% Patented Nov. 24, 1914.

2 SHEETS-SHEET l O. E. LARSON.

SPRING MOTOR. APPLICATION FILED N0v.21,1913.

Lmaom Patented NOV. 24, 1914.

' 2 SHEETSmSHEET 2.

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S'RING-MTOR.

essere operating spiral band-springs to enable a' maximum uniform power to be resultant;

- and further? to provide an improved means Afor mounting the band-springs and for spring as taken en the line j-- of Fig. i.

transmitting their actions one to another,

ln the accompanying drawings:

lFigure l is a view in section through an embodiment of my improved spring-motor, as taken on the line l-l of` Fig. 2. Fig. 2 is an end view of the spring-motor, looking at the Winding end of l. Fig. 3 is a sectional view through the 'lrst Wound,

a4 isal transverse sectional vieu7 on the line l lr-fl of Fie. l, showing the second Wound spring'. Fig. 5 is a transverse sectional view as taken on the line 5 5 of Fig. l. Fig. 6 is a view in elevation ofthe `spring motor.

The spring-motor in Aitself is mounted entirely upon a shaft 7 and this shaft can be suitably supported in relation to means to be driven by the motor; it being understood that a. motor of this type can be mounted in various devices and machines for supplying a stored' up spring energy; and in the present case the shaft 7 is journaled at its ends in bearing brackets 8, the winding means are in the form of a crank 9 journaled in a bracket l and carrying a spur-gear ll in mesh with a spurgear l2 journaled loosely7 upon and adjacent one end of shaft 7, and the means to bel driven by the motor is a shaft i3 having a fixed spur-gear 14 meshing' with a spurgear l5 mounted loosely on the end of shaft 7 opposite gear 12. l

, A sleeve l is'mount-ed keyed to shaft 7 with one end abutting the hub of gear l2; and mounted loosely rotatable upon said Specification. o Letters atent.

ppleation filed november 21, 1913. Serial Eto, @253533.

sleeve and spaced from gear 2? .is a spoked casing 1 6 held iised to gear12 by bolts l? which hold the casing' lo upon a peripheral casing 18 interposed between members l2 and lo. A band-spring 19 is located Within the inelosure thus formed, is coiled spirally from its inner end counter-clockwise as seen in Fig. 2 about the sleeve l5,'with its said inner end fined at 20 to said sleeve and its outer end fixed at 2l to a bolt 17. A sleeve 22 is keyed 'to-shaft .7 and mounted loosely upon sleeve 22 is a side casing 23, which together with side casing 24 mounted loosely upon shaft 7, and peripheral casing 25, form an inclosuic Ifor a second spring, the casings 23 and being bolted `upon casing 25 by bolts 2G. A bandspring 27 is located Within this casing,is coiled spirally about sleeve 22 in a direction opposite to that of spring 19, and has its inner end fastened to sleeve 22 and its outer end fastened to one of the bolts 26. A sleeve is mounted looselyupon shaft i", is connected 'xedlv to the side casing 2st by a collar 22 and a spring casing- 8G similar to the aforementioned casings is mounted loosely 'upon sleeve 28 and shaft 7, inclosed a band-spring 3l with its inner end attached to sleeve 28 and its outer end to casing 30, one side of casing 30 being formed by the gear l5 which transmits the spring force from the motor. El paivl 32 pivotally mounted on shaft 'Z engages gear l1 and holds same from backward movement, that is', from movement against that for Winding up the springs. Thus there are three handsprings cooperatively connected to transmit motion one to another; but the connection between the sleeves of tivo adjoining springs might be differently constructed, for in` stance, the .sleeves l5" and 22 lneed not be keyed to shaft 'l' but 'be one integral sleeve loose upon the shaft, the present lconstruc- .tion being shown to illustrate the fact that the first tivo springs may be mounted on the shaft at pointsA spaced any distanceaprart for the purpose of avoiding intermediate ob#- structions; and similarly sleeve 28 could be integral with casing" 25, this construction shown being'very'useful as feature in assembling the spring-motor. To utilize a greater number of springs the added springs would bear the same relation and connections as spring 31 is to spring 27.A

Assuming shaft 13 to be locked against rotation, the cranli 9 is turned in the direc tion shown in Fig. 2 to wind up the springs.

Thus the spring 19, the first, is wound from its outer end; and since the resistance to the inner end 20 of sprin 19 is that of the inner end of spring 27, sai inner end 20 will turn said inner end of.. spring 27 winding up the latter spring from its inner end ina manner opposite to the winding ot spring 19. The resistance to the outer end of spring 27 being that of the inner end of spring 31, said spring 31 will be wound up from its inner end 1n a manner similar to sing 27. The outer end of spring 3l being ed., the spring limit is reached. In this winding the winding of the springs is to an extent simultaneous, that is, the winding is divided proportionally to the several springs according to their resistance, the first spring being wound until its wound end causes a resistance. great enough to transmit winding' movement to the second, and in a like manner the'end of the second to the ywinding end of the third; and this proportion will continue, the first spring being wound first, then the second and third, respectively. 'Ihe resulting spring force is in the same direction as the winding force expended. The spring energy of the motor is now ready to be expended and transmitted to means to be oper ated; and by rendering shaft 13 free to rotate it will be turned by the spring force at arate according to its working resistance. In this unwinding of the spring it will be observed that the casing of the spring 19 is held from rotation (unwinding action) by the pawl 32, and that the iixed resistance ends of springs 27 and 31 rotate as their spring force is being expended; therefore, the energy of the three springs combine to develop the resulting power' in a. manner so that they individually expend their forces at different rates, each reaching their limit at different times; thus a spring forceis resultant that is substantially uniform throughout a greater part of its expending of energy.

I claim as my invention:

'1. A spring-motor,` having a series of concentrically mounted spiral band-springs,

connections between the springs including, a connection between the mner ends of two adjolnmg springs, and a connectlon between the outer end of one of said two springs and the inner end of a third 2. 'A spring motor, comprising a plurality ofsprings connected in series. the lirst of the series being an ini'ial winding spring and the last being a resultant power spring, the winding spring and resulta-nt spring spring.

arianna' being wound in opposite directions, means for winding the first spring of the series in one direction, and means connected with the last s ring of the series to be driven thereby in a irection opposite to that of the winding means.

3. In a spring-motor, lthe combination of a spiral band-spring adapted to be wound from its outer end, a spiral band-spring having its inner end connected to the inner end of the first mentioned spring, and a spiral band-spring having its inner end connected to the outer end of `said second mentioned s ring and adapted to transmit the spring orce of said springs through its outer end.

4. A spring motor, comprising a plurality of springs connected in series, means for winding the springs from the outer end of the first spring of the series, and means conf nected to the outei end of the last spring of the series, to be driven thereby. f

5. In a spring-motor, the combinatian with a shaft, of a sleeve mounted on the shaft, a spiral band-spring wound about: the sleeve and having its inner end connected thereto, a member loosely mounted on the shaft and attached to the outer end of the said spring, a spiral band-spring wound about the shaft in a direction oppositeto the first mentioned spring, having its inner end connected to said sleeve, and a memother,'and a third spring having its inner end connected with the outer end of said spring that is wound, said third spring being wound in a like direction therewith.

7. In a spring motor, tw'o springs the inner ends of which are so nected that the two are not ywound simultaneously, and a third spring the inner end of which is so operatively connectedwith the outer end of one of the first; two springs that none of the springs are wound simultaneously.

8. In a spring motor, wound springs, means connected' with the outer end of one of the springs for windiing the' same, an operative connection' between the inner end of said driving sprin and the inner end of the other spring, and riven means connected with the outer 'end of the driven spring.

9. In a spring motor, the' combination of a shaft, a spring coiled thereabout with one end tixedly connected thereto, means to" -two oppositely on the shattl and operatively con-` In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

` OSCAR E. LARSON. Witnesses:

H. D. MORGAN, R. F. HYNE. l 

